package chapter05;

public class Cylinder {
    private double r;
    public  double height;

    public double getR(){
        return r;

    }

    public void setR(double r) {
        this.r = r;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }
    public double mianji(){
        double s = 3.14*r*r*height;
        return s;
    }

}
